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JB400 – Instruction and Installation Manual
3
AVOIDING ELECTRICAL DISCHARGES
ATTENTION
Electrostatic discharges may damage semiconductor electronic components in printed circuit
boards. They usually occur when touching components or connector pins from devices, without
wearing the appropriate equipment to prevent discharges. It is recommended to take the following
precautions:
• Before handling the devices, remove the electrostatic charge from your body by wearing a
proper wristband or touching grounded devices;
• Avoid touching electronic components or connector pins of the devices.
PREVENTING LOW INSULATION AND HUMIDITY
ATTENTION
Use suitable cable glands, and properly seal the JB400
cover and unused connections. The
humidity can cause low insulation, damaging signals and electronic circuits. This type of problem is
not covered by Smar warranty.
JB400 – Instruction and Installation Manual
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JB400 – Instruction and Installation Manual
5
JB400 – INTELLIGENT JUNCTION BOX
Description
JB400 offers spur protection against short circuits (between + and – terminals), limiting the short
circuit current in each spur at 50 mA. During a short circuit situation there is no effect in the other
spur or the main trunk. There is a LED to indicate short circuits and JB400 has an integrated bus
terminator.
In normal operation, each short circuit protector consumes less than 1 mA. After removing the short
circuit, the spur goes back to normal operation and the protection circuit is disabled, and the LED is
dimmed.
Main characteristics
• Intelligent Junction Box for fieldbus installations in compliance with the IEC61158-2 standard
(PROFIBUS-PA and Foundation fieldbus);
• 4, 6 or 8 spurs;
• Intelligent protection against short circuit in each spur, preventing the short circuit propagation.
After removing the short circuit, the spur goes back to normal operation;
• Quick and easy installation;
• Maintenance during operation;
Figure 1 – JB400
Installation
• Mount the JB400 in easy access place to connections. The JB400 must be properly
located so as to minimize the length of spurs to the devices.
• The JB400 can be mounted directly on walls or panels using fixation screws.
• Close and seal unused connections properly to meet the protection class IP66
requirements.
IMPORTANT
Close the JB400 properly and ensure the correct cable glands mounting.
Close unused
connections properly, preventing humidity penetration, as it can generate low insulation. In
situations with humidity, JB400 damage is not covered by warranty.
JB400 – Instruction and Installation Manual
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Wiring Diagram
Technical Specifications
CHARACTERISTICS
Physical layer
In compliance with IEC 61158-2
Power supply
Bus-powered 9 to 32 Vdc
Communication protocols
Profibus-PA and F
OUNDATION
fieldbus
Maximum trunk current
2.5 A
Quiescent current per spur in normal
operation
< 1 mA
Maximum current per spur during a
short circuit
50 mA
Maximum voltage drop per spur
0.3V@20mA
Number of spurs
4, 6 or 8
Spur connections
Removable 3-pin terminal blocks, 2.5 mm²
Surge protector at input
Cut in 62 V, 1500 W
Cover closing
4 screws with O-ring
Housing Material
Aluminum
Mounting
Via screws (for panel) or support with pipe
clamp
Protection degree
IP 66
Terminator
100 Ω resistor and 1µF capacitor selectable by
switch
Status LED
On (red): spur in short circuit condition;
Off: spur in normal operation
ENVIRONMENTAL CONDITIONS
Operation Temperature
-20°C to 70°C
Storage
-40°C to 85°C
Humidity
0-95% non-condensing
DIMENSIONS AND WEIGHT
Dimensions (mm)
180 x 180 x 100
Weight
1.6 kg
Short Circuit
Protection Short Circuit
Protection
+
-
+
-
S S
+-
S S
-
+
Esclosure
Ground
Spur 1 Spur N
N = 4, for model with 4 spurs.
N = 6, for model with 6 spurs.
N = 8, for model with 8 spurs.
JB400 – Instruction and Installation Manual
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Exploded View and Dimensional Drawing
EXPLODED VIEW - JB-400 8 SPURS
1
Identification plate
2
Housing fixation screw
3
Cover
4
WSP300-8
5
WSP300 fixation rail
6
Fixation bracket for 2" pipes
7
M20x1.5 cable gland (black)
8
Spur box
9
M20x1.5 cable gland (gray)
JB400 – Instruction and Installation Manual
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Ordering Code
MODEL
JB400
INTELLIGENT JUNTION BOX
COD.
Number of Spurs
4
6
8
4 Spurs
6 Spurs
8 Spurs
COD.
Electrical Connections
A
M20 X 1,5 (cable gland included)
COD.
Mounting bracket
0
C
I
Without bracket
Carbon steel bracket
Stainless steel bracket
COD.
Technology
F
P FOUNDATION fieldbus
PROFIBUS
JB400
-
-
*
*In case of no special options leave blank.
Special Options
Painting
P0
Gray Munsell
Identification Plate
I6
Without certification
Housing Material
H0
Aluminum
/